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作 者 ：陈成升;谢志霞;刘小京*

期 刊 ：植物研究 2009年 29卷 6期 页码：708-713

关键词：冬小麦；旱胁迫；盐胁迫；可溶性糖；脯氨酸；

Keywords:winter wheat, drought stress, salt stress, soluble sugars, proline, ion,

摘 要 ：分别以PEG-6000、NaCl模拟干旱胁迫及盐胁迫，采用水培方法研究了抗旱耐盐冬小麦沧-6001在干旱胁迫、盐胁迫条件下叶片可溶性糖、脯氨酸和可溶性蛋白质含量的动态变化以及Na⁺、K⁺在地上部和根系的分布。结果表明可溶性糖和可溶性蛋白变化趋势相似，其含量随干旱胁迫或盐胁迫时间延长而增加，但在胁迫处理后期下降，并且随胁迫强度增加，二者出现下降时间提前；脯氨酸在干旱胁迫条件下快速积累达到峰值后下降但在胁迫处理后期再次增加，在盐胁迫条件下，随胁迫强度的增加和胁迫时间的延长而增加；Na⁺在干旱胁迫下随胁迫程度增加而下降，盐胁迫条件下随胁迫程度的增加而增加，K⁺在干旱胁迫或盐胁迫下均随胁迫程度的增加而下降，且在根系中下降的速度大于地上部。

Abstract:A hydroponic method was used to investigate the effect of drought and salt stresses on the distribution rule of Na⁺ and K⁺ in shoots and roots and the dynamic transformation of soluble sugars, soluble protein and proline in leaves of drought-and salt-tolerant winter wheat cultivar Cang-6001. The results showed that the accumulation rule of soluble sugars and protein in leaves was similar, which were increased with prolonging stress time, but decreased in the later period of stress treatments. When the concentration of PEG or NaCl was increased, the time that sugars and protein began to decrease advanced; proline was increased quickly firstly and decreased quickly after reaching peak value，but increased once again in the later period of drought stress condition, which was increased with increased NaCl concentration and prolonging stress time under salt stress condition; the content of Na⁺ in plant was decreased with increased PEG concentration but increased with increased NaCl concentration, the content of K⁺ were decreased with increased PEG or NaCl concentration, and the speed of fall was faster in root than in shoot.

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